4 Common Causes of a Sagging Roof: What to Know

4 Common Causes of a Sagging Roof: What to Know

While a roofing system is typically made of durable materials and properly installed, it still gets subject to wear and tear over time. This is because it is constantly exposed to harsh outdoor elements, such as the scorching sun, heavy rain, strong gust of winds, pests, trees’ leaves, and branches, and other debris. 

One of the most obvious signs of damages is a sagging roof, which is characterized by the drooping materials of the roof’s surface. Not only is this unsightly in appearance, but it can also compromise its overall functionality. This is when roofing repair becomes necessary.

In this article, we will share the four common causes of a sagging roof:

1. Excess weight 

A heavy weight of debris sitting on your roof can eventually cause it to sag over time. The chances are that tree leaves, twigs, branches, pests, and other materials take space on your roof. If you neglect it over time by not cleaning and maintaining it, it will eventually weigh the roof down. This leaves a sagging roof, which will be unsightly in appearance and compromise the structural integrity of your roof!

2. Low-quality materials

If you install or replace your roof with low-quality materials, you can expect it to sag over time. They won’t even withstand the weather conditions and other harsh outdoor elements or endure the test of time. Keep in mind that a roof with quality materials isn’t also designed to last forever. While asphalt can last for up to 40 years and wood for up to 30 years, clay tiles can last between 40 and 60. If you want your roof to last for 50 to 100 years, you should opt for steel and copper instead.

3. Poor installation

No matter how quality the materials are, they can sag in the long run if they aren’t installed properly. Keep in mind that the poor workmanship of your roofing system can lead to all sorts of issues, and a sagging roof is on top of these problems. This is why it’s crucial to hire a highly reliable roofer who has the knowledge, skills, expertise, and experience in the field. With top-notch installation, you can expect your roof to last for as long as possible without the risks of premature sagging!

4. No regular maintenance

As with any house part or component, your roof needs to be taken care of regularly. Constant upkeep typically involves inspection, cleaning, and maintaining your roof at least once a year. If you find some roofing issues, even minor ones, be sure to address them before they escalate to extensive damages. By doing so, you’ll see how it will be beneficial in the long run by protecting your property and family!

Here at Cardinal Roof, our roofing services are top-notched with quality roofing products, an exceptional team, and outstanding warranties. Our goal is to install and service a roof that will be beneficial for years to come. Ultimately, we treat every home like it’s our own and every client like family!


At this point, you now know what causes a roof to sag—excess weight, low-quality materials, poor installation, and no regular maintenance. When installing or replacing a new roof, you must always remember to opt for quality materials and ensure proper installation. Also, be sure to have no excess weight on it and have constant upkeep. With all these in place, you can expect your roof not to sag and last for many years!

As a roofing company in Birmingham, AL, we’re specialized in providing roofing services for residential and commercial properties. Whether you need a roof inspection, installation, repair, or maintenance, get in touch with us today to see how we can help!